Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp @ 20417:d35872270666
8057658: Enable G1 FullGC extensions
Summary: Refactored the G1 FullGC code to enable it to be extended.
Reviewed-by: mgerdin, brutisso
| author | sjohanss |
|---|---|
| date | Tue, 09 Sep 2014 00:05:25 +0200 |
| parents | 1f1d373cd044 |
| children |
| rev | line source |
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| 342 | 1 /* |
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2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP | |
| 27 | |
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28 #include "gc_implementation/g1/g1HotCardCache.hpp" |
| 1972 | 29 #include "memory/allocation.hpp" |
| 30 #include "runtime/thread.hpp" | |
| 31 #include "utilities/globalDefinitions.hpp" | |
| 32 | |
| 342 | 33 // Forward decl |
| 34 class ConcurrentG1RefineThread; | |
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35 class G1CollectedHeap; |
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36 class G1HotCardCache; |
| 20337 | 37 class G1RegionToSpaceMapper; |
| 342 | 38 class G1RemSet; |
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39 class DirtyCardQueue; |
| 342 | 40 |
| 6197 | 41 class ConcurrentG1Refine: public CHeapObj<mtGC> { |
| 794 | 42 ConcurrentG1RefineThread** _threads; |
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43 uint _n_threads; |
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44 uint _n_worker_threads; |
| 1111 | 45 /* |
| 46 * The value of the update buffer queue length falls into one of 3 zones: | |
| 47 * green, yellow, red. If the value is in [0, green) nothing is | |
| 48 * done, the buffers are left unprocessed to enable the caching effect of the | |
| 49 * dirtied cards. In the yellow zone [green, yellow) the concurrent refinement | |
| 50 * threads are gradually activated. In [yellow, red) all threads are | |
| 51 * running. If the length becomes red (max queue length) the mutators start | |
| 52 * processing the buffers. | |
| 53 * | |
| 1282 | 54 * There are some interesting cases (when G1UseAdaptiveConcRefinement |
| 55 * is turned off): | |
| 1111 | 56 * 1) green = yellow = red = 0. In this case the mutator will process all |
| 57 * buffers. Except for those that are created by the deferred updates | |
| 58 * machinery during a collection. | |
| 59 * 2) green = 0. Means no caching. Can be a good way to minimize the | |
| 60 * amount of time spent updating rsets during a collection. | |
| 61 */ | |
| 62 int _green_zone; | |
| 63 int _yellow_zone; | |
| 64 int _red_zone; | |
| 65 | |
| 66 int _thread_threshold_step; | |
| 67 | |
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68 // We delay the refinement of 'hot' cards using the hot card cache. |
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69 G1HotCardCache _hot_card_cache; |
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70 |
| 1111 | 71 // Reset the threshold step value based of the current zone boundaries. |
| 72 void reset_threshold_step(); | |
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73 |
| 342 | 74 public: |
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75 ConcurrentG1Refine(G1CollectedHeap* g1h, CardTableEntryClosure* refine_closure); |
| 342 | 76 ~ConcurrentG1Refine(); |
| 77 | |
| 20337 | 78 void init(G1RegionToSpaceMapper* card_counts_storage); |
| 794 | 79 void stop(); |
| 342 | 80 |
| 1111 | 81 void reinitialize_threads(); |
| 82 | |
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83 // Iterate over all concurrent refinement threads |
| 794 | 84 void threads_do(ThreadClosure *tc); |
| 342 | 85 |
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86 // Iterate over all worker refinement threads |
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87 void worker_threads_do(ThreadClosure * tc); |
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88 |
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89 // The RS sampling thread |
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90 ConcurrentG1RefineThread * sampling_thread() const; |
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91 |
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92 static uint thread_num(); |
| 1019 | 93 |
| 94 void print_worker_threads_on(outputStream* st) const; | |
| 1111 | 95 |
| 96 void set_green_zone(int x) { _green_zone = x; } | |
| 97 void set_yellow_zone(int x) { _yellow_zone = x; } | |
| 98 void set_red_zone(int x) { _red_zone = x; } | |
| 99 | |
| 100 int green_zone() const { return _green_zone; } | |
| 101 int yellow_zone() const { return _yellow_zone; } | |
| 102 int red_zone() const { return _red_zone; } | |
| 103 | |
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104 uint total_thread_num() const { return _n_threads; } |
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105 uint worker_thread_num() const { return _n_worker_threads; } |
| 1111 | 106 |
| 107 int thread_threshold_step() const { return _thread_threshold_step; } | |
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108 |
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109 G1HotCardCache* hot_card_cache() { return &_hot_card_cache; } |
| 342 | 110 }; |
| 1972 | 111 |
| 112 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP |